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Moonshot AI is a Beijing artificial intelligence company that builds the Kimi family of large language models and the Kimi chatbot.

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Image Moonshot AI on Hugging Face published with the announcement covered in this storyTech AI Latest

Moonshot AI publishes Kimi K3.1 Pro open weights: 2.8T parameters, cyber data removed

Open Source AI

Moonshot AI put the weights of Kimi K3.1 Pro on Hugging Face on 4 November 2026: 2.8T parameters, about 104B active, a 1M context and a custom license.

Summary

Moonshot AI published the weights of Kimi K3.1 Pro on Hugging Face on 4 November 2026, meeting the date it set when the model launched in its API on 23 October. The mixture-of-experts model has 2.8 trillion total and about 104 billion active parameters and a context window of about 1 million tokens. Moonshot says it removed cyber-related training data before the open release. The weights ship under a custom Kimi license.